#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <algorithm>
#include <bitset>
#include <climits>
#include <cmath>
#include <cstring>
#include <deque>
#include <forward_list>
#include <functional>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

using namespace std;
typedef long long ll;
typedef pair<int, int> PII;
typedef pair<int, ll> PIL;
typedef pair<ll, int> PLI;
typedef pair<ll, ll> PLL;
typedef bitset<16> BS;
struct edge {
    int to, cost, id;
};
const double PI = 3.14159265358979323846;
const double EPS = 1E-09;
const ll MOD = 1E+09 + 7; // =998244353;
const ll INFL = 1E18;
const int INFI = 1E09;
const int MAX_N = 1E+05;

ll dx[4] = { -1, 1, 0, 0 }, dy[4] = { 0, 0, -1, 1 };

int64_t seed;

uint32_t x = 0, y = 1, z = 2, w = 3;
ll generate()
{
    uint32_t t = (x ^ (x << 11));
    x = y;
    y = z;
    z = w;
    w = (w ^ (w >> 19)) ^ (t ^ (t >> 8));
    return (ll)w;
}

bool f(ll c);

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> seed;

    /*
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cout << "i = " << i << ", j = " << j << ", dp = " << dp[i][j] << "\n";
        }
    }
    */

    ll low = 0, high = INFL;
    while (true) {
        ll mid = (low + high) / 2;
        if (mid == low || mid == high)
            break;
        if (f(mid)) {
            high = mid;
        } else {
            low = mid;
        }
    }

    cout << high << "\n";

    return 0;
}

bool f(ll c)
{
    x = seed, y = 1, z = 2, w = 3;
    int res = 0;
    for (int i = 0; i < 10000001; i++) {
        if (generate() <= c)
            res++;
    }
    return res > 10000001 / 2;
}